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Jurnal Kimia (Journal of Chemistry)
Published by Universitas Udayana
ISSN : 19079850     EISSN : 25992740     DOI : 10.24843/JCHEM
Core Subject : Science,
Chemistry
Jurnal Kimia (Journal of Chemistry) publishes papers on all aspects of fundamental and applied chemistry. The journal is naturally broad in scope, welcomes submissions from across a range of disciplines, and reports both theoretical and experimental studies.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 12 Documents
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Search results for , issue "Vol. 5, No. 1 Januari 2011" : 12 Documents clear
ANALISIS FATTY ACID ETHYL ESTER DENGAN INFRA RED DALAM DARAH TIKUS WISTAR SETELAH MINUM ALKOHOL SECARA AKUT Ni Made Suaniti
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

Fatty acid ethyl esters (FAEE) are the result of biochemical reactions in the body after drinking alcohol acutely. In general, alcoholic drinks contain ethanol, which can be analyzed chemically as ethanol and its metabolites. Metabolite of ethanol are the result of ethanol oxidation reaction and the reaction of ethanol with endogenous compaounds in the body. One of the metabolites of ethanol is an ester compound resulted from the reation of ethanol with fatty acids. This study aims to prove the existence of FAEE functional group as one of biochemical markers in acute alcohol consumers. Two groups of wistar rats were given distilled water (control group) and 20% alcohol (treaed group) every day for 1 week. Biochemical markers analyzed are FAEE. This research was conducted in two phases: the first phase, is the treatment of rats with acute alcohol. The second phase, analysis of chemical compounds: FAEE with Infra Red Spectrophotometer. Wistar rat blood samples taken 6 and 24 hours after drinking alcohol acutely were analyzed qualitatively. Functional Groups indicating the presence of FAEE are C-H (3600-2500 cm-1), the ketone group (C = O) appears at 1870-1540 cm-1, stretching vibration of CO or C-C (= O)-O at 1190-1140 cm- 1.
MOLECULAR MODELING OF CATIONIC PORPHYRINS AS LIGAD OF RADIOPHARMACEUTICAL KIT Ni Made Pitri Susanti; Rahmana E. Kartasasmita; Amir Musadad; Daryono H. Tjahjono
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

Cationic porphyrins and their interactions with DNA have become an important concern due to its role as a photosensitizer in photodynamic therapy for cancer treatment. However, this therapy technique has the disadvantage, i.e. its inability to document photographically the fluorescence observed endoscopically. The present research aims to observe the change in molecular level of cationic porphyrins which labeled by radionuclides emitting ? particle and ? radiation. Molecular models of 5,10,15,20-tetrakis-[3.4-bis (carboxymetylenoxy) imidazoliumyl] porphyrin (T3,4BCImP), 5,10,15,20-tetrakis-[3,4-bis (carboxymetylenoxy) pirazoliumyl] porphyrin (T3,4BCPzP) and its complexes which labeled by Tc and Re radionuclides were optimized and calulated by density functional theory methods (DFT). Atomic charges were calculated with natural population analysis/NPA method. The calculation result showed that Tc-T3,4BCPzP has the highest photosensitivity and the strongest affinity to DNA. Carboxylate groups of meso-subtituent of porhyrins lead to label cationic porphyrins by Tc and Re as radiopharmaceutical ligand candidates .
KOMBINASI BAHAN ORGANIK (RASIO C:N) PADA PENGOLAHAN LUMPUR (SLUDGE) LIMBAH PENCELUPAN Ida Ayu Ary Pramaswari; I Wayan Budiarsa Suyasa; Anak Agung Bawa Putra
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

A research on the Combination of Organic Matter (the ratio of C:N) in the Sludge Treatment of dying waste has been conducted. The sludge was mixed with organic matter wich were dried leaves and dung in various compositions. The compositions (sludge : organic matter) made were 3 : 7, 1 : 1, and 7 : 1.In this research it was found that the first composition contained the highest organic matter (the lowest C : N = 28.05/1) and showed the best effect to the composting process indicated by physical characteristics. The Compost with the lowest ratio C:N (17,71/1) gave the best total N, organic C, available K, and available P contents which were 0.98%; 17.90 %; 22,092.1894 ppm; and 568.2312 ppm respectively. All composts had organic C and total N that meet the SNI 19-7030-2004, and high available P and K contents. These were in agreement to the evaluation of fertility analysis. More over, all compost showed physical caracteristic such as temperature, colour, texture, and odour that are in agreement to those of SNI 19-7030-2004. Unfortunately the pH did not meet the SNI 19-7030-2004.
FOTODEGRADASI METILEN BIRU DENGAN SINAR UV DAN KATALIS Al2O3 Ida Ayu Gede Widihati; Ni Putu Diantariani; Yuliana Farhatun Nikmah
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

The research was conducted to observe the photodegradation of methylene blue by UV light and Al2O3 catalyst. The research determinated the optimum Al2O3 catalyst weight, the optimum pH, the optimum radiation duration and the effectivity of photodegradation at optimum conditions. Degradation of methylene blue were analyzed by UV-Vis spectrophotometer. The results showed that the optimum Al2O3 catalyst weight was 40 mg the optimum of pH was 11, and the optimum of radiation duration was 4 hours. The effectivity of photodegradation was (30.22 ± 1.17)%.
OPTIMASI JENIS PELARUT DALAM EKSTRAKSI ZAT WARNA ALAM DARI BATANG PISANG KEPOK (Musa paradiasiaca L. cv kepok) DAN BATANG PISANG SUSU (Musa paradiasiaca L. cv susu) I Wayan Suarsa; Putu Suarya; Ika Kurniawati
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

Research on optimation of the type of solvent in natural dye found in extracs of kepok banana’s stem (Musa paradiasiaca L. cv kepok) and susu banana’s stem (Musa paradiasiaca L. cv susu) has been carried out. The obtained natural dye was determined for its rendement, natural dye groups, and the maximum absorption at 400 – 700 nm. Maseration of 100 g of dry powder of kepok banana and susu banana stems were conducted using four kinds of solvent namely, ethanol, acetone, and n-hexane. From kepok banana’s stem thick extracts 9.21 grams water; 3.19 grams ethanol; 1.23 grams acetone; and 0.21 grams n-hexane were obtained, whereas from susu banana’s stem were 12.13 grams water, 3.31 grams ethanol, 1.42 grams acetone, and 0.17 grams n-hexane thick extracts.Extracts obtained were concentrated, and then the rendements were determined. The redements from the kepok banana’s stem, were : water (36.84%), ethanol (12.67 %), acetone (4.92 %), and n-hexane (0.84%), whereas from susu banana’s stem, were : water (28.52%), ethanol (13.24%), acetone (5.68 %). and n-hexane (0.68%),The result of the fitochemical test showed that the natural dye on kepok and susu banana’s stem using four solvents was flavonoid. whereas tannin on both types of banana’s stem was only found in ethanol, acetone, and n-hexane extracts.Analysis using spectrophotometry UV-vis showed that n-hexane extracts gave the maximum absorption greater than the other solvents. The absorbance of kepok banana’s was 0.992 at 607.0 nm and of susu banana’s was 0.905 at 669.5 nm.
AKTIVITAS ANTIOKSIDAN DAN ANTIJAMUR SENYAWA ATSIRI BUNGA CEMPAKA PUTIH (Michelia alba) I Gusti Agung Gede Bawa
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

Isolation of white tropical magnolia’s (Michelia alba) essential oil by maseration method was carried out. Antifungal activity test was conducted by measuring resistibility against Candida albicans growth, whereas antioxidant activity test was conducted with spectroscopy technique by using Difenilpikril hidrazin (DPPH) as antifree radical. Compound contents analysis of the isolate was carried out by Gas Chromatography-Mass spectroscopy (GC-MS).From 1000 grams of white tropical magnolia’s flower 3.18 grams n-hexane extract, 1.19 grams of chloroform extract, and 0.88 grams of ethyl acetate extract were gained. The retardation area for the three extracts were 0 mm. Free radical damping percentage were 24.47% for the first 5 minutes and 79.14% after 60 minutes for n-hexane extract, 21.72% for the first five minutes and 25% after 60 minutes for chloroform extract, 21.93% for the first five minutes and 39.87% after 60 minutes for ethyl acetate extract. Compound analysis was carried out for n-hexane extract that have the highest antioxidant activity. GC-MS analysis showed that white tropical magnolia’s flower had 6 major component i.e. 1,3-Benzioxole,5-(2-propenyl), cyclohexane; 1-ethenyl-1-methyl-2,4-bis (1-methylethenyl); Butanoic acid; 3-methyl-,2-phenylethyl ester; 9,12-Octadecadienoic acid, methyl ester; Tricosane; Pentacosane.
UJI AKTIVITAS ANTIBAKTERI FRAKSI KULIT BATANG NANGKA I Made Dira Swantara; Ida Bagus Gede Darmayasa; Ni Komang Ayu Kumala Dewi
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

This research aims to isolate and identify antibacterial compounds in jackfruit bar husk (Artocarpus heterophyllus, Lam.). 735.55 gramc of jackfruit bar husk yielded 500,25 grams of crude methanol.extract. The methanol extract was fractionated using petroleum ether, ethyl acetate and of n-butanol and then evaporated to yield crude extract of ethyl acetate 4.11 grams of petroleum ether (yellowish), 2.11 grams of ethyl acetate extract (brownish), and 1.17 grams of n-butanol (dark green).Bioactivitigs tests to Staphylococcus aureus and Eschericia coli showed that ethyl acetate extract had the largest inhibition zone. The purification of ethyl acetate extract with column chromatography resulted a faction which was antibacterial active (faction C).Identification of faction C using Gas Chromatography Mass Spectroscopy showed 3 compounds namely methyl hexadecanoate, dioctyl hexadioate, and dioctyl-1,2-benzene dicarboxylate.
REGENERASI LEMPUNG BENTONIT DENGAN NH4+ JENUH YANG DIAKTIVASI PANAS DAN DAYA ADSORPSINYA TERHADAP Cr(III) Emmy Sahara
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

This paper discusses the adsorption capacity of bentonite clay to Cr (III) which was previously regenerated with saturated NH4+ and heat activated. The clay regenerated was the clay that have been used for adsorption of Cr(III) in solutionIt was found that bentonite clay regenerated and heated at 150oC had the highest specific surface area and porous total volume which were 119.9632 m2/g and 107.3561 x 10-3 mL/g, respectively. The distribution of the porous size was bimodal, namely microporous and mesoporous, whereas the isotherm patern observed was classified as the L type. The highest surface acidity of 2.3644 mmol/g was showed by the clay that was heated at 350oC with active situs of 1.4238 x 1021 atom/g. The adsorption capacity of the clay increased with temperature. The highest adsorption capacity of 19.878 mg/g was shown by the clay that regenerated and activated at 150oC.
STUDI PEMANFAATAN CAMPURAN ZAT WARNA ALAMI DAN ASAM SITRAT SEBAGAI MORDAN TERHADAP KAYU JENIS AKASIA DENGAN METODE SIMULTAN MORDANTING Ni Wayan Bogoriani
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

Wood is one of several materials that is very useful to man kind, that even wood with low quality tends to be increasingly used. The great need for wood has been cousing wood of high quality is getting more difficult to obtain. To make wood of lows quality having high artistic value, a research to dye Acacia leucopholea wood with a mixture of natural dyes (Uncaria gambir-piper betle Linn leaves-Areca catechu seed) and 0.5 gram of citric acid in 100 mL water was conducted. To test its physical and chemical properties the treated wood 1% detergent solution was soaked in for 10 minute.The research conducted showed that the optimum mass proportion of the mixture for submertion of 10 minute with simultan mordanting method was 5.0:3.0:3.0 g (Uncaria gambir:piper betle Linn leaves:Areca catechu seed). The mixture resulted in Brown color and mean adsorption of 0.19 g of wood surface and showed highest durability against decolorization and mass loss test using 1% detergent solution.
PERTUMBUHAN Streptococcus mutans PADA BIOAKTIVITAS EKSTRAK RIMPANG LENGKUAS SECARA in vitro DAN PEMANFAATANNYA SEBAGAI ZAT AKTIF PADA PASTA GIGI iurlina Siregar; Ferdinand Saras Dhiksawan; Anna Farida
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

The study aims to (i) isolate white galangal (Alpinia galanga) and red (Alpinia purpuruta) rhizome extract compound, (ii) examine its bioactivity against Staphylococcus mutans, and (iii) investigate its usage as an active substance in tooth paste in the laboratory. The result of the study indicates that the extract of n-hexane of red galangal has a higher bioactivity effect against Staphylococcus aureus compared to the white one. The examination of the experimental tooth paste with an addition of 1 % active substance (extract of n-hexane, namely D and J fractions) indicates that the diameter of resistance against Staphylococcus aureus formed by D fraction is higher (15.5 mm) than the positive control (15 mm). Meanwhile, an addition of active substance of 1.5 % D and J fractions indicates a higher diameter of resistance (16.2 mm and 14.7 mm) compared to positive control.. IR and GC-MS analysis indicates that the most dominant compound existing in D fraction is 2-metil -1-(o-tolil)pentanol, while the most dominant compound in the J fraction is 2--ethyl-5-methyl benzoic acid.

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